thats a tutorial on how to add your own custom post types and as you can see this is a very extensive topic.

So first of all follow the turoial above. If you have added a new custom post type (lets say it is named “cards”)

if you want to have the same options for this post type (slideshow, layout options etc) you need to open the register-admin-metabox.php file in includes/admin and in the first array modify all sub arrays that read:

'page'=>array('post','page')

by appending the name of the new type

'page'=>array('post','page','cards')

You will probably also need to clone the single-portfolio.php file and rename it to single-cards.php

As you can see this is not an easy task and nothing that is covered by the usual support. If you have problems with adding these options to the theme I would recommend to hire a freelancer :)